| This study evaluated efficacy of orthodontic adhesives with fluoride or amorphous calcium phosphate (ACP) for enamel decalcification prevention. Methods. Artificial lesions were induced by pH cycling 40 human premolars bracketed with control resin (Transbond XT(TM)), adhesive containing ACP (Aegis OrthoRTM) or fluoride (QuickCure(TM)). The lesions were examined by X-ray photoelectron spectrophotometry (XPS) and polarized light microscopy (PLM). Bacterial adhesion to composites was determined. Results. After 28 days, Aegis OrthoRTM demonstrated lowest calcium and phosphorus content by XPS. PLM after 42 days showed QuickCure(TM) had 23.6% reduction in lesion depth area while Aegis OrthoRTM had 20.3% (Mann-Whitney test, p<0.05). Compared to Transbond XT(TM), S. mutans adhesion to Aegis OrthoRTM and QuickCure(TM) was reduced by 41.8% and 37.7% (One-way ANOVA, Scheffe test p<0.05). Conclusion. In this short-term in vitro study, composites containing ACP or fluoride promoted less S. mutans adherence and lesion formation compared with a composite without ACP or fluoride. |
